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韭菜疫病是韭菜生产重要病害。由鞭毛菌亚门疫霉属真菌引起的，除危害韭菜外，还危害葱、洋葱、蒜、茄子、番茄等。 1 症状 韭菜各部位都表现症状，尤为假茎和鳞茎受害最重。叶片上初现水浸状暗绿色病斑，病斑扩展到半个叶片时，叶片变黄，下垂、软腐，湿度大时，病部长出灰白
Leek disease is an important disease in chive production. Phytonomycosis Phytophthora caused by fungi, in addition to endanger leeks, but also onions, onions, garlic, eggplant, tomatoes and so on. 1 symptoms All parts of the leek performance symptoms, especially pseudostem and bulb most affected. Leaves appear on the water-soaked dark green lesions, lesion extended to half of the leaves, the leaves turn yellow, drooping, soft rot, humidity, the disease grows gray